// 版权所有2009 Go作者。保留所有权利。
// 此源代码的使用受BSD样式
// 许可证的约束，该许可证可以在许可证文件中找到。

// 软件包数学提供基本常数和数学函数。
// 
// 此软件包不保证跨架构的结果完全相同。
package math

// 数学常数。
const (
	E   = 2.71828182845904523536028747135266249775724709369995957496696763 // https:
	Pi  = 3.14159265358979323846264338327950288419716939937510582097494459 // https:
	Phi = 1.61803398874989484820458683436563811772030917980576286213544862 // https:

	Sqrt2   = 1.41421356237309504880168872420969807856967187537694807317667974 // https:
	SqrtE   = 1.64872127070012814684865078781416357165377610071014801157507931 // https:
	SqrtPi  = 1.77245385090551602729816748334114518279754945612238712821380779 // https:
	SqrtPhi = 1.27201964951406896425242246173749149171560804184009624861664038 // https:

	Ln2    = 0.693147180559945309417232121458176568075500134360255254120680009 // https:
	Log2E  = 1 / Ln2
	Ln10   = 2.30258509299404568401799145468436420760110148862877297603332790 // https:
	Log10E = 1 / Ln10
)

// 。
// Max是该类型可表示的最大有限值。
// SmallestNonzero是可由类型表示的最小正非零值。
const (

)

const (
	intSize = 32 << (^uint(0) >> 63) // 32或64 

	MaxInt    = 1<<(intSize-1) - 1
	MinInt    = -1 << (intSize - 1)
	MaxInt8   = 1<<7 - 1
	MinInt8   = -1 << 7
	MaxInt16  = 1<<15 - 1
	MinInt16  = -1 << 15
	MaxInt32  = 1<<31 - 1
	MinInt32  = -1 << 31
	MaxInt64  = 1<<63 - 1
	MinInt64  = -1 << 63
	MaxUint   = 1<<intSize - 1
	MaxUint8  = 1<<8 - 1
	MaxUint16 = 1<<16 - 1
	MaxUint32 = 1<<32 - 1
	MaxUint64 = 1<<64 - 1
)
